Fisher™ 289L-289H系列安全閥是一款彈簧負載式節(jié)流泄壓閥，可用作下游壓力調壓器，防止系統(tǒng)出現(xiàn)過壓。 平穩(wěn)的節(jié)流操作在泄壓操作期間可大限度地降低系統(tǒng)中的壓力沖擊。289 系列泄壓閥是低壓設置的理想選擇，因為大閥膜面積可獲得更高的靈敏度。289 系列泄壓閥設計用于壓力控制；它們不適合用作 ASME 安全泄壓閥。廣州奧麗斯特燃氣設備有限公司是美國FISHER產品華南區(qū)域（廣東?。┌瘓F*代理商。Fisher™ 289L-289H系列安全閥
尺寸小
簡單可靠
設計緊湊
規(guī)格
閥體尺寸和端口連接方式
289A 和 289U 型：1/4 NPT
289H 型：1，2 NPT
289HH 型：1 NPT
289L 型：3/4，1 NPT
289U 型：1/4 NPT
允許的大泄壓（入口）壓力
100 psig / 6.9 bar
泄壓設定壓力范圍（5 個型號）
5"wc 至 50 psig / 25mbar 至 3.5 bar
取壓方式
內取壓
溫度適用范圍
橡膠 (NBR) 和氯丁橡膠 (CR)：-20 至 150°F / -29 至 66°C 氟橡膠 (FKM)：20 至 300°F / -7 至 149°C 僅 289H 和 289HH 型
大致重量
289A 和 289U 型：0.75 lb/0.3 kg
289H 型：1 NPT - 4 lb/2 kg, 2 NPT - 15 lb/7 kg
289HH 型：4 lb/2 kg
289L 型：15 lb/7 kg
289H：泄壓壓力調節(jié)范圍
0.5 至 2.25 psig / 34 至 155 mbar
289H：大泄壓（入口）壓力
25 psig / 1.7 bar
Fisher 289 Series relief valves are spring-loaded throttling relief valves used as downstream pressure regulators to protect the system from overpressure. A smooth throttling action minimizes pressure surges in the system during relief operation. 289 Series relief valves are ideal for low-pressure settings due to the increased sensitivity provided by a large diaphragm area. 289 Series relief valves are designed for pressure control; they are not ASME safety relief valves.
Features
Throttling Type Relief
High Flow Rates
Small Size
Reliability Due to Simplicity
Compact Design
Specifications
Body Sizes and End Connection Styles
Types 289A and 289U: 1/4 NPT
Type 289H: 1, 2 NPT
Type 289HH: 1 NPT
Type 289L: 3/4, 1 NPT
Type 289U: 1/4 NPT
Maximum Allowable Relief (Inlet) Pressure
100 psig / 6.9 bar
Relief Set Pressure Ranges (5 models)
5wc to 50 psig / 25mbar to 3.5 bar
Pressure Registration
Internal
Temperature Capabilities
Nitrile (NBR) and Neoprene (CR) Elastomers: -20 to 150°F / -29 to 66°C Fluorocarbon (FKM): 20 to 300°F / -7 to 149°C Available with Types 289H and 289HH only
Approximate Weights
Type 289A and 289U: 0.75 Pounds / 0.3 kg
Type 289H: 1 NPT - 4 Pounds / 2 kg, 2 NPT - 15 Pounds / 7 kg
Type 289HH: 4 Pounds / 2 kg
Type 289L: 15 Pounds / 7 kg
289H: Relief Adjustment Ranges
0.5 to 2.25 psig / 34 to 155 mbar
289H: Maximum Relief (Inlet) Pressure
25 psig / 1.7 bar
Fisher China Guangzhou Honest Gas Equipment Co., LTD.
